文献类型：期刊文献

英文题名：Effect of Aluminum Ions on the Change in Fouling Ability of Foulants: Insights from the Transparent Exopolymer Particles Formation and Determination

作者：Jin, Jiarou[1]; Li, Yue[1]; Liang, Dawei[1]; Fan, Wenhong[1]; Yang, Linyan[2]; Zhao, Qian[3]; Zhang, Meng[4]; Zhang, Wenxiang[5]; Meng, Shujuan[1]

机构：[1] School of Materials Science and Engineering, Beihang University, Beijing, 100191, China; [2] School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China; [3] School of Municipal and Environmental Engineering, Shandong Jianzhu University, 1000 Fengming Road, Jinan, 250101, China; [4] School of Electronic and Information Engineering, Beihang University, Beijing, 100191, China; [5] Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, China

年份：2024

外文期刊名：SSRN

收录：EI(收录号：20240107836)

语种：英文

外文关键词：Aluminum - Coagulation - Current density - Ions - Membranes

摘要：Membrane fouling is one of the main concerns in membrane process. Many endeavors have been made while accurate control of micromorphological characteristics of foulants is still lacking. In this study, the influence of electrocoagulation pretreatment on membrane fouling was investigated via determination and characterization of the transparent exopolymer particles (TEP) formed by bridging of aluminum ions. Results showed that the fouling propensity increased and subsequently decreased with the rise in current density. Staining of TEP revealed that, at low current density, the TEP resulting from few aluminum ions was small and amorphous, leading to the development of a dense fouling layer during filtration. Conversely, with the increase in current density, the abundant aluminum ions induced more alginate aggregation, resulting in the larger and structurally more stable TEP, which developed fouling layers with porous structure. It was found that it was not the quantity of TEP but the quality of TEP developed by foulants that determined the fouling. The fouling ability of foulants decreased by a factor of 5.29 after pretreatment at 3 mA/cm2 electrocoagulation. This study provides evidence that application of appropriate electrocoagulation pretreatment reduces the fouling ability of organic foulants and offers notable advantages in mitigating membrane fouling. ? 2024, The Authors. All rights reserved.